troy.maillet.9 Posted November 27, 2014 Share Posted November 27, 2014 Ok so i have replaced all Brake switches 2 beyond the dash , 2 under the steering wheel , one under the hood , replaced the Trudder valve and peddle plate but I still have no brake lights !!!! man can anyone help me b4 I drive this truck off a cliff !! Im kidding of course Sent from my iPhone using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/37885-air-brake-switches-on-2001-mack-rb/ Share on other sites More sharing options...
thomastractorsvc Posted November 27, 2014 Share Posted November 27, 2014 Switches or valves? I would think you would have only one brake switch that is plumbed into the brake supply line with two wires A hot and then To The Turn Signal to the lights Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/37885-air-brake-switches-on-2001-mack-rb/#findComment-268342 Share on other sites More sharing options...
rsb502 Posted December 6, 2014 Share Posted December 6, 2014 Yeah on an RB the brake lights should work off of an air switch, two wires, are you looking for current on your air switches? There will be two with 2 wires I can think of, one is normally open the other normally closed, the normally open switch is the brake light switch, +12v on one wire all times, +12on both or closed when the brake is applied over 5-10psi. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment https://www.bigmacktrucks.com/topic/37885-air-brake-switches-on-2001-mack-rb/#findComment-269305 Share on other sites More sharing options...
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